Five classic VOB demos for testing your 5.1 surround system
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This page contains five classic Dolby Digital 5.1 demo trailers in VOB format. These are DVD-era files — predating TrueHD and Atmos — but they’re still useful for verifying 5.1 configurations on legacy systems or players that don’t support modern lossless formats.
The most downloaded Dolby Digital 5.1 demo trailers of the five by a wide margin is Channel Check, with over 113,000 downloads in our library. At 69 seconds it’s the longest file here by a wide margin — long enough to verify all six channels properly, not just confirm decoding is active. If a channel isn’t working, you’ll know by the end of it.
Argon is the opposite: just 7 seconds, ideal for a quick check without committing to a longer file. It’s also the oldest in terms of production and runs at PAL resolution (720×576 at 25fps), same as Channel Check — the other three are NTSC (720×480 at 29.97fps), a relevant detail if your player handles framerate conversion poorly.
The most technically interesting is Aurora, the only one of the five in Dolby Digital 5.1 EX — an extension of standard 5.1 that adds a matrixed rear center channel. Not all receivers decode it the same way, and on equipment that doesn’t recognize the EX flag it may play back as conventional 5.1 without any warning.
All files use the MPEG-PS container (VOB), which means guaranteed compatibility with DVD and Blu-ray players, but can cause issues on some modern software players that don’t include the MPEG-2 codec by default — VLC handles them fine, but Windows Media Player in basic configurations may reject them.